import axios from 'axios';
import {
  ElNotification, ElMessageBox, ElMessage, ElLoading,
} from 'element-plus';
import { saveAs } from 'file-saver';
import store from '@/store';
import { getToken } from '@/utils/auth';
import errorCode from '@/utils/errorCode';
import { tansParams, blobValidate } from '@/utils/ruoyi';
import cache from '@/plugins/cache';

let downloadLoadingInstance;
// 是否显示重新登录
export const isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8';
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: import.meta.env.VITE_APP_BASE_API,
  // 超时
  timeout: 10000,
});

// request拦截器
service.interceptors.request.use((config) => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false;
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;
  if (getToken() && !isToken) {
    config.headers.Authorization = `Bearer ${getToken()}`; // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = `${config.url}?${tansParams(config.params)}`;
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime(),
    };
    const sessionObj = cache.session.getJSON('sessionObj');
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj);
    } else {
      const s_url = sessionObj.url; // 请求地址
      const s_data = sessionObj.data; // 请求数据
      const s_time = sessionObj.time; // 请求时间
      const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ${message}`);
        return Promise.reject(new Error(message));
      }
      cache.session.setJSON('sessionObj', requestObj);
    }
  }
  return config;
}, (error) => {
  console.log(error);
  Promise.reject(error);
});

// 响应拦截器
service.interceptors.response.use(
  (res) => {
  // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode.default;
    // 二进制数据则直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
      return res.data;
    }
    if (code === 20101) {
      if (!isRelogin.show) {
        isRelogin.show = true;
        ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
          confirmButtonText: '重新登录',
          cancelButtonText: '取消',
          type: 'warning',
        }).then(() => {
          isRelogin.show = false;
          store.dispatch('LogOut').then(() => {
            location.href = '/index';
          });
        }).catch(() => {
          isRelogin.show = false;
        });
      }
      return Promise.reject('无效的会话，或者会话已过期，请重新登录。');
    } if (code === 500) {
      ElMessage({
        message: msg,
        type: 'error',
      });
      return Promise.reject(new Error(msg));
    } if (code !== 200) {
      ElNotification.error({
        title: msg,
      });
      return Promise.reject('error');
    }
    return Promise.resolve(res.data.data);
  },
  (error) => {
    console.log(`err${error}`);
    let { message } = error;
    if (message == 'Network Error') {
      message = '后端接口连接异常';
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时';
    } else if (message.includes('Request failed with status code')) {
      message = `系统接口${message.substr(message.length - 3)}异常`;
    }
    ElMessage({
      message,
      type: 'error',
      duration: 5 * 1000,
    });
    return Promise.reject(error);
  },
);

// 通用下载方法
export function download(url, params, filename) {
  downloadLoadingInstance = ElLoading.service({ text: '正在下载数据，请稍候', background: 'rgba(0, 0, 0, 0.7)' });
  return service.post(url, params, {
    transformRequest: [(params) => tansParams(params)],
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    responseType: 'blob',
  }).then(async (data) => {
    const isLogin = await blobValidate(data);
    if (isLogin) {
      const blob = new Blob([data]);
      saveAs(blob, filename);
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode.default;
      ElMessage.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r);
    ElMessage.error('下载文件出现错误，请联系管理员！');
    downloadLoadingInstance.close();
  });
}

export default service;
